<!DOCTYPE html>
<html>
<head>
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <title>Canvas lessions</title>
</head>
<body>
  <select id="lessons"></select>
  <br>
  <textarea id="code" style="width:400px; height:400px;"></textarea>
  <canvas id="canvas" width="400" height="400" style="border: solid 1px;"></canvas>
  <script type="module" src="js/bundle.js"></script>
  <script nomodule src="js/bundle-iife.js"></script>
</body>
</html>